Collapsible copyholder



June 10, 1952 s. SATTLER 2,599,784

COLLAPSIBLE COPYHOLDER Original Filed D80. 6, 1944 2 SHEETS-SHEET l ZHVEHL UF 1 538 012912 Scrler T EybZ/ZmjMWL L 5 June 10, 1952 s. SATTLER COLLAPSIBLE COPYHOLDER 2 SHEETS-SHEET 2 Original Filed Dec. 6, 1944 [UVEHL Ur fiqa/eezz 'aler Patented June 10, 1952 Stephen S-attler, Tulsa, Okla.

Original application December 6, 1944', Serial No. 566,809. Divided and this application February 11, 19.50, Serial No. 143,699

. Claims.

This invention relates to' a' collapsible copy holder;

More particularly, the'invention relates to a collapsible copy holder having mechanism operable both manually and automatically for progressive movement of copy material, with means to release tensioned copy-gripping elements for insertion and removal of copy material, and meansto restore the copy-gripping elements to tensioned condition upon extension from collapsed and untensioned condition.

It is a further object of this invention to provide a copy holder having positive means to restore to tensioned condition upon extension of the copy holder copy-holding means which are in relieved condition when the copy holder is collapsed.

It-is also an object of this invention to provide a copy holder having means to release copygrippingmeans for insertion or removal of copy, and to position copy when inserted.

Other and further objects and advantages of this inventionwill be apparent to those skilled inithe art from the following description and appended drawings.

n the drawings Figure 1 is a front elevational view of a copy holder according to this invention, with certain parts" in section;

Figure 2 is a rear elevational view of the copy holder;

Figure 3 is a side elevational view of the copy holder, looking to the left in Figure 1 Figure 4 is an enlarged fragmentary detail view of a portion of Figure 3, with the parts in a different position;

Figure 5 is an enlarged fragmentary detail View of. another portion of Figure 3, with the parts in another position;

Figure 6 is a vertical sectional view taken on the line 'VI-VI of Figure 3 Figure 7 is a view similar to Figure 6, but showing the parts in different positions;

Figure 8 is a'view partially in section of a lever member'shown in Figures 6 and 7;

Figure 9 is an enlarged fragmentary side elevation from the left in Figure 1 Figure 10 is a view similar to Figure 9, but showing the parts in another position; and

Figure 11 is an enlarged fragmentary vertical sectional view taken on the line XIXI of Figure 1.

This application is a division of my application U. S. Serial No. 566,809 filed December 6, 1944, which issued as Patent No. 2,503,355 on April 11, 1950. v

The copy holder as illustrated herein is gen- 2 orally similar to thecopy-holder-'disclosed'inzmy Patent No. 2,170,161 dated August 22,, 1939, en? titled "Collapsible. Copy Holder, although the invention is not limitedto this particular type. or

copy holder.

As illustrated, the copy holderhas'a; copy moving rearpart 2 I and a copy-gripping forward part 22, each having upper and lower'telescop; ing sections .so that the copy holder may be col-'- lapsed or extended by vertical downward orupward movement of the upper sections on the lower sections.

The upper section 23 of the rear part21l is slidable on vertical standards 24 secured. on "a base 25, and is held in extended position on the standards by suitable mechanism (notrsholwnl releasable by a release lever 26 to permit col-'- lapsing of the copy holder.

The upper section 21 of the forward part '22 has a pair of depending legs 28 each provided with a sleeve portion 29 at the lower ends thereof. A horizontal rod Wis-mounted forrota tional movement on the base 25. and has its ends extended upwardly to provide a pair of guides 3| for the legs 28 of the upper section 21; the sleeves 29 sliding on' the guides 3l'.- Suitable locking means (not shown) are provided to hold the upper section 21' in extended-position on'th'e guides 3|, the locking means being releasable by the releasing lever 26- to permit the upper section 21 to move downwardly.

Projections 32 extend rearwardly fromthe junctions of the guides 31' and the rod 30 and are urged against the base 25 by springs 33. By "this construction, the upper section 21 0f the forward part 22 of the copy holder is urged rearwar'dly against the upper section 23 of the rear part2! so that copy may be gripped securely therebetween. A roller 34 is mounted in the upper-section 23, and a roller 35 is journaled in the upper section 21, the copy being gripped between the nip of these rollers. It is to be understood that the invention is not limited in appli'cation to a copy holder employing rollers for holding and movingcopy, sinceother means may be used for this purpose. Rollers, however, provide a simple means, and for convenience the copy holder is described as including the rollers 34' and 35.

A rod 36 is mounted for rocking movement along the rear edge of the base 25 and has flat portions 31 aligned with the projections? 32", which extend over the rod 35' and seat on the flat portions 31. Thus, rotation or'rocking ofxthe rod 36 will raise the ends of the projections 32 to rock the rod '30 and move the guides 3| and legs 28 forwardly, separating the roller 35 from the roller 34 to prevent any binding of the sleeves 3 29 on the guides 3| which might be occasioned by the springs 33 in urging the roller 35 against the roller 34. In this untensioned or relieved condition, the upper section 2'! can move smoothly on guides 3|.

A crank or lever 38 has one end secured to one end of the rod 36 and the other end pivotally connected to the lower end of a bar 39 which has a slot 40 therein and extends upwardly and is connected to the release lever 26 at its upper end by a pin 4| engaged in the slot 40. As best shown in Figures 9 and 10, movement of the lever 26 to release or unlock the upper sections 23 and 2! in their extended condition so that they may be moved downwardly to the standards 24 and guides 3|, respectively, to collapsed condition of the copy holder draws the bar-'39 and the end of the lever 38 connected thereto upwardly and thus rotates or rocks the 1 rod 36 to 'move the'forward part 22 into untensioned or relieved position, as already explained above. The upper sections 23 and 21 may then be easily'moved down to collapsed position.

The lever 26 moves with the upper section 23,

with the pin 4| riding in the slot 40 of the slotted -bar 39 and downward movement of the section -23 therefore does not affect the relieved conditionrof the forward part 22, the rod 36 remainingin the position to which it was moved by releasing movement of the lever 26. Upward movement of the sections 23 and 21 and of the lever 26 from collapsed to extended position similarly'leaves the rod 36 unaffected. A shock or jar might,'0f course, return the rod 36 to the position in which the projections 32 rest on the fiat portions 31, but this is unreliable and undesirable. The invention provides positive means -for restoring the forward part 22 of the copy holder to. tensioned condition.

At "the'side of the copy holder opposite that 'at which the lever 38' and bar 39 are disposed,

a bar.42 is secured for substantially vertical reciprocating movement to actuate the mechanism .(not shown) for rotating the roller 34. The bar 42 is moved downwardly to rotate the roller and is returned to raised position by any suitable means; The bar 42 is provided with a slot 43 -part'48 and a straight forward part 49 pivotally connected by a screw 50. A support 5| extends forwardly from the base 25 and has the lever parts pivoted thereon, the forward part 49 as by a knurled head screw 52 and the rear part 48 as by a screw 53. The connection of the bar 44 and the lever 41 is at a point slightly forward of the rear end of the rear lever part 48.

A key or button 54 is secured to the free end ofthe forward lever part 49 for depression by the. finger of an operator when the copy holder is manually operated. It will be clear that depression of the button 54 moves the rear end of the rear lever part 48 downwardly and there- .by draws the connecting bar 44 and the slotted bar' 42 downwardly to rotate the roller 34. The return movement of the bar 42 to raised position raises the rear end of the rear lever part 48 and the front or free end of the forward lever part 49.

Upon collapse of the copy holder, the slotted bar 42 moves downwardly with the upper section 23, such movement being permitted by the slot 43 in which the pin 45 is entered. Similarly, the slotted bar 42 rises with the upper 'section 23' when it is moved upwardly to extended position from its collapsed position. The length of the slot 43, however, is such that in collapsed condition of the copy holder the upper end of the slot engages the pin or screw 45 and moves the connecting bar 44 downwardly, and with it' the rear end of the rear lever part 48. As the upper section 23 is moved to extended position, the lower end of the slot 43 engages the screw 45 to move the connecting bar 44 and the rear end of the rear lever part 48 upwardly.

As shown in Figures 3 and 5, a curved arm 55 is rigidly secured at one end to the end of the rod 36 opposite the end to which the lever 38 is attached. The arm 55 extends between the rear lever part 48 and the support 5| and parallel thereto. The rear portion of the rear lever part 48 may be offset outwardly to provide sufficient space for the arm 55. Disposed above the arm 55 and in the'same vertical plane is a pivoting member 56 having a rear ofiset portion 51 and a portion 58 of its rear edge projecting laterally to engage over the top edge of the rear lever part 43 and to the rear of the connecting bar 44. The pivoting member 56 is pivoted at its central portion to the support 5| as by a screw 59 forwardly of and above the rod 36.

When the copy holder is collapsed, the rocking of the bar 36 to relieve the spring tension on the forward part 22, as previously explained,

' rotates the curved arm 55 to the upper posi- When the upper sections 23 and 21 are moved upwardly in extending the copy holder from its collapsed position, the rear portion of the rear lever part 43 is raised by the connecting bar 44, as explained above, and carries with it the lateral projection 58 to rotate the pivoting member about the pivot screw 53 so that the forward portion of the pivoting member 56 forces the curved arm 55 downwardly to the lowered position illustrated in Figure 3. This movement of the arm 55 rocks the rod 36 back to its position in which the flat portions 31 receive the projections 32 so thatthe forward part 22 of the copy holder is again urged against the rear part 2|. It will thus be seen that the curved arm 55 and the pivoting member 56 provide positive means for restoring the forward part 22 to tensioned condition.

The invention also includes means for temporarily relieving the tension of the forward parts 22 and for separating the roller 35 from the roller 34 and for restoring the part 22 to its pressing position. This means also permits quick and easy insertion or removal of copy and positions the copy in proper alignment for movement in the copy holder. A horizontal bar 5!] is rotatably mounted in the upper section 23 of the rear part 2| at the level of the sleeve portions A plurality of prongs 6| extend radially from the bar 60 at intervals along the length salesmen 'tlierecfitoneptfthefprongsit l. zcbfeingralignediwith eachroi-"th'e sleeve portions 29,-. vAt one side for :the 'copyholdr; preferably the side opposite that "at which the releasing leveri26-is disposed, a relieving "lever 62 *is' provided which is. secured lto one end ibf'therod 60' in any suitable manner, as by 'the forwardjipart '22 against-the "pressure f tithe springs:- 38 to" separate the rollers 34 and.: ;35. Copy-may thus merely be dropped Ibetweencthe rollers andwill come .to :rest on some or all of the prongs 6 I to be supported thereby in .proper horizontal-falignment." The endsptithe prongs; at

leastrthose moving againstthe sleeve portions 29, are preferably smoothly rounded. The rounded ends*are-illustrated in Figure 4 as provided by fdrming 'the-end of the prong'lil as abent" or hooked portion 64.

The prongs 6| preferably extend downwardly in normal position, as-shown in Figuresl and 2, and 'move 'clockwise as viewed in Figures 3 and 4-upon relieving movement-of the lever 62, but it will be clear that the arrangement might be otherwise than as shownanddescribed. Reverse movement of the relieving lever 62, ofcourse, permits-the springs 33 to movethepart 22 back'to its pressing position-with the copy firmly gripped between the roller 34-and 35.

The'lever' 62, of course; may be operated to separate the rear part 2| and the forward part 22 for 'the purpose of removingcopy instead of inserting it. Inthis case the part 22 may be returned immediately to pressing position or held in its position separated from the part 2| until additional copy'h'as been inserted.

The invention includes mechanism for automatic'operatio'n of the copy-moving mechanism of the'tcopyj-h'older. The automatic mechanism is adapted tob'e actuated'by the carriage or other moving partof a-typewriter or similar machine utilized in'connection with the copy holder. The mechanism comprises an automatic spacing lever 65 mountedfor oscillating movement in a vertical' plane parallel to the-parts- 2| and'22. At its bottom-end the spacinglever 65 has a rearwardly extending horizontal projection 66 rotatably mounted? in spacedbracketsfil and 68 carried by the support 5|. The projection'66 may be integral .withithe lever 65 or rigidly secured'vthere to; as desired. The'bracket 61 is 'preferablyclose to the "spacing lever '65 and'the bracket 58 :is located'rearwardly of the pivot 53 of the *rcar'lever part- 48 of the manual spacing lever 41.

A pressing lever 69-is secured on the horizontal projection" 66 to: extend radially therefrom with itsxouterend restingqon the upper edge .of the rear-lever part 48. As shown, the pressing lever 69 has one iendencircling theprojectionfifi and held against'rotation thereon by a setscrew l6" bearingona flat portion 1| formed on the projection 66. If desired, the projectionfiGmay-be provided with a polygonal portion instead of the-flat: portion H to permit relative angular adjustment of" the pressing lever 69 and the au-' 'tomatic: spacing lever 65. Of course, the pressing lever 69 may be formed integral with thepro- J'ection 66. A spacing sleeve or collar 12 may be.v inserted between the bracket 68 and tthe pressing: lever69. A finger-.13 extends from. thersupportuiil v.above-:theamessing leverzfll :limit the rotation onthe lever-69 .in :a-clockwiseg. rectiomaswiewed' in Figures :61, and, 7 .andthuslimits movement to the'right o1 the automatic;.lever:65.

To; the :uppergend of the automatic; spacin lever is secured an extension lLwhichiszillustrated as. a. channel-shaped member: but whichmay be ofzsomeotherzform such as;:tubular. Therextension 14 is secured to :the leveri65 by: screws "15 :extending through 1a;slot 16 fformed in the..wall of theu'extensioni 14 to permittlongitudinal adjustment of "the leverrand extension so that v the combined .lngththereof may" be varied. Two: opposed wall.p'ortions;o1'rthe.= extension project'upwardly to provide lugs-H .in spaced relationiwith apivot'lfl, such-rasapin, rivet ':or .screw; extending 'therethrough. A"-..el'aw 19 issupported by the pivot'lfl'forpivotal movement between thelugs 11 in the plane of movementof the lever 65. Atits upperend, as viewed in Figure G, the -claw '19 has "an engaging ffin'ger 89 and'at'itslower enda tail 6|, and one edge of the claw is preferably smoothly curved convexly 'from the finger to the tail'8l. The other edge of the claw is formed to provide a projection' 82 intermediate the finger and 'tail, and a notch 83-is provided in this'projection.

Within the extension 14 between the'upper end of the lever 65 and'the claw 19 there is a lower block 84 bearing on the end of the spacing lever 65 and an upper block 85 bearing on 'the' lower portion of the claw 19. The lower portion of the block 85 and'the upper portion of the'block 84 each" has a-recess86 receiving one'end of a spring 8? urging the blocks apart from eachother. Headed pin members such asthe screws 88 extend through slots 89 inthe Wall 'of the extension 14 and into the blocks 84 and '85'to hold the blocks against movement out of the extension 14 while permittinglimited movement of the blocks longitudinallywithin-the extension. The upper end of'the'block85is-tapered to an edge 9|] adapted to engage the notch 83'of the claw".

It' will be seen that the construction ofthe extension 14 and the'claw19 is such that with the'claw 19 in raised position'movement ofthe finger 80 to the left as viewed in Figuresfiand "'1 will cause thetail 8| to engage'the'extensi'o'n 14 andhold the extension and the finger 60 substantially rigid; swinging the extension 14 and the lever 65 in the direction of'movement of the finger 80, about the axis of the horizontal projection 66, which; of course, rotates in the brackets.6| and 68 and moves the rear portioniof the rearmanual'spacing lever part48 downwardly by means of the pressing lever 69.

Movement of thesfinger 89 in the opposite direction, or theright, as viewed in Figuresfi and '7, is not resisted by the tail 8| and therefore does not cause movement of the extensionv l4 and the lever 65. Instead; the finger 80 moves clockwiselabout the .pivot l8, thus approaching the lowered". or retracted position :of the claw 19. Anytendency to move the extension .14 and automaticispa'cing lever 65 'with the claw I9 in this direction is prevented by the limiting finger 13 positioned above thepressing lever 69, whichacts as a stop to upward movement of the lever '69, and thus 1 to clockwise movement of thelever65'and'extension 14. The pivotin'g movement of the "claw 19 about the pivot 18 takes placeragainst" the yielding resistance ofuthe upper block 85; and when the force causing the movementis removed the-resilienceof thespring 87 acting throughlsthe I 65 rendered inoperative. "is pivoted in a clockwise direction as viewed in -85 into engagement.

block 85 on the lower edge of the -projection 82 returns the claw 19 to its raised position.

If automatic operation of the copy holder is not desired, the claw 19 may be moved to its lowered position and the automatic spacing lever In this case, the claw Figures 6, 7 and 8, in the manner already described, but the movement is continued until the edge 90 of the block 85 engages in the notch 83 of the claw 19. Inthis position of the claw, the

notch 83 is vertically aligned with the pivot 18 and the edge 99 of the block, and the pressure of the spring 81 therefore does not cause movement of the claw in either direction, but, instead, holds the claw against movement. The claw 19 aybe returned to its raised position ,by reverse pivotal movement thereof which causes-the block 85-to move downwardly out of the notch 83 and again bear against the bottom edge of the projection 82. The edge 9|lof the block may be rounded to facilitate its disengagement from the notch.

A typewriter T, or a similar machine, ordi narily used in connection with the copy holder to copy the material carried by the copy holder, is utilizedto actuate the automatic spacing lever 65 for automatic operation of the copy holder without requiring manual operation of the lever The copy holder is positioned behind the typewriter T with. the support and the manual spacing lever 47 extending along one side of the typewriter, and with the typewriter so spaced from the parts 2| and 22 that the carriage C of the typewriter T is just forward of the automatic spacing lever 65 and its extension 14. A catch 9|, which may be simply a small plate or bar, may be secured in any suitable manner to the carriage C at a convenient point to extend through the plane of the claw 19. As the carriage C is moved to the left as viewed in Figures 6 and '7,

the catch 9| engages the finger 80 of the claw l9 and swings the automatic spacing lever 65 to depress the rear portion of the rear manual spacing lever part 43, thus drawing down the connecting bar 44 and slotted bar 42 for rotation of the roller 34 to movecopy in the copy holder so as to present fresh material for copying.

Since the finger 80 describes an are about the axis of the horizontal projection 66, continued movement of the carriage C results in the finger 8|) swinging below the level of the catch 9| for disengagement therefrom. The return movement .j o'f the slotted bar 42 raises the rear end of the rear lever part 48 and with it the free end of the pressing lever 59 to return the automatic spacing lever 65 to its normal position, with the claw 19 in position for engagement with the catch 9|.

As the carriage C and the catch 9| move in the opposite direction, the catch again engages the claw 19, but it merely rides over the conveXly curved edge thereof, depressing the finger 80 by pivotal movement in a clockwise direction against the resilience of the spring 81, and as soon as the catch 9| has passed beyond the finger 80 the claw 19 returns to its raised position, the pivotal movement thereof by the catch 9| being insumcient to bring the notch 82 and the block The carriage C and the catch 9| may thus move to the right without hindrance and without causing any movement of the automatic spacing lever.

The combined length of the lever 65 and extension 14 is preferably so adjusted that the movement of the carriage C, just' after the roller 34 has been. actuated. The automaticspacing lever and the carriageC are shown in Figure 6 with the catch 9| engaging the finger of the claw F9 as the carriage moves .to the left, and in Figure 7 just after disengagement of the finger 80 and the catch 9| after further movement to the left of the carriage C.

The catch 9|, although shown and described as provided to engage the automatic spacing lever structure, might in many if not all cases be omitted and a convenient projection ofthe carriage C utilized instead, such as the head of a screw,;for example.

It will be obvious that in copying on the typewriter T a line from the copy held in the copy holder, starting with the carriage C in its position to begin a line of typing, which corresponds to the extreme left-hand position of the carriage as viewed in Figures 6 and 7, the carriage Cmoves to the right as seen in those figures with the catch 9| riding over the claw 19, as previously explained, until the end of the line is reached, when the carriage C is in an extreme right-hand position. The carriage C is then returned by the operator to its extreme left-hand position to begin a new line of typing and, as already explained, this leftward movement of the carriage actuates the automatic spacing lever structure to operate the copy holder so that a fresh line of material to be copied is presented. Thus, the movement of copy in the copy holder is correlated with the movement of the paper in the typewriter on which the material is being copied without requiring any manual operations by the operator other than those required for the operation of the typewriter itself.

When automatic operation of the copy holder is not desired, as when a line-for-line copy is not being made or when the copy material in the copy holder consists of shorthand notes or the like, it it only necessary to move the claw 19 to its inoperative position as already explained, in which position it is below the level of the catch 9| so that there can be no engagement therebetween.

The manual spacing lever 41 is not rendered inoperative by the automatic spacing lever 65 and its associated structure. In fact, the automatic spacing lever structure utilizes the rear lever part 48 of the manual lever 41 to operate the copy holder and in effect substitutes the movement of the pressing lever 69 against the rear lever part 48 for the manual depression of the button 54 on the forward lever part 49 of the manual lever 47. The manual spacing lever 41, therefore, may be employed not only as an alternative to the automatic spacing lever 65 but also, without rendering the automatic lever structure inoperative, as a supplement thereto, as when a portion of the copy in the copy holder is not to be copied on the typewriter.

It should be clear, however, that the automatic spacing mechanism need not operate by means of the manual lever 41, since obviously the lever 69 might be connected directly to the bar 44 for drawing the bar 42 downwardly. Similarly, the automatic spacing lever structure might have independent linkage with the mechanism for rotating the roller 34. 7

It will be understood that modifications and variations may be effected Without departing from the scope of the novel concepts of the present invention.

I claim as my invention:

l. A collapsible copyholder including means comprising a first part and a second part for holding and moving copy, biasing means to urge said second part against said first part in extended position of said copyholder, means including a rock shaft to separate said second part from said first part and overcome said biasing means, and means to restore the effectiveness of said biasing means upon movement of the copyholder from collapsed to extended position, said restoring means comprising a member connected to said copyholder for movement upon extension of the copyholder, a pivot member having one end engaged by said connected member, and a lever secured at one end to said rock shaft and in the same plane as said pivot member, the other end of said pivot member engaging the free end of said lever to move said lever for rocking said shaft upon movement of said pivot member by said connected member.

2. In a collapsible copyliolder having tensiona'ole copy-holding means and a rock shaft rotated to one position for relieving tension on said means when said copyholder is col apsed, means for restoring said tension comprising a member connected to said copyholder for movement upon extension thereof from collapsed position, a pivoted member having one end engaging said connected member for pivoting of said pivot member upon movement of said connected member, and a radial projection on said rock shaft in the plane of said pivot member for engagement by the other end of said pivot member upon pivoting thereof to rotate said rock shaft from its tension-relieving position.

3. A collapsible copyholder including tensionable copy-holding means, a rod rotatable to one position for relieving tension on said means and to another position for restoring said tension, means to rotate said rod to tension-relieving position upon collapsing of the copyholder, a lever linked to said copyholder for movement upon extension thereof from collapsed condition, a pivoted member having one end engaging said lever for pivoting movement of the pivoted member thereby, and a crank on said rod engageable by the other end of said pivoted member upon pivoting movement thereof to rotate said rod to tension-restoring position upon extension of the copyholder from collapsed condition.

4. A collapsible copy holder including a base, a first part projecting upwardly from said base and having a platen thereon, a second part yieldably mounted on said base in spaced relation with respect to said first part and having a pressure roller thereon for engaging a copy with said platen and holding the copy in place on said platen, said first and second parts both being collapsible, biasing means to urge said second part in a direction to engage said pressure ro ler with said platen in the extended position of said copyholder, means including a rock shaft to separate said second part from said first part and overcome said biasing means upon collapsing of said copy holder, and other means for separating said second part from said first part against the bias of said biasing means and supporting the copy in horizontal alignment upon separation of said parts, including a horizontal shaft journaled in one of said parts having a plurality of radial projections extending therefrom and normally disposed out of contact with said other part, and means connected with said shaft for rocking said shaft to rotate said projections against said other part to separate said pressure roller from said p aten for the insertion or removal of copy, and into position to support the inserted copy when said pressure roll and platen are separated from each other.

5. A collapsible copy holder including a base, a first part extensibly mounted on said base and having a platen rotatably mounted thereon, a second part extensibly mounted on said base and having a pressure roller thereon for holding copy in engagement with said platen, spring means biasing said second part in a direction to urge said roller into engagement with said platen, a release lever releasing said second part to move from an extended to a collapsed position, and a lever mechanism connected with and operated by said release lever to pivot said second part to move away from said platen as said first part is released to move to a collapsed position and to release said second part to move toward said first part by said spring means when said support member approaches an extended position, and including a link moved vertically by vertical movement of said first part, a member pivoted on said base and pivoted by vertical movement of said link, and a rocking arm operated by pivotal movement of said member to move said pressure roller out of engagement with said platen.

STEPHEN SATTLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,825,522 Harnsberger Sept. 29, 1931 2,170,161 Sattler Aug. 22, 1939 

